diff options
Diffstat (limited to 'src/shared/libosmocore/src/gsm/tlv_parser.c')
| -rw-r--r-- | src/shared/libosmocore/src/gsm/tlv_parser.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/src/shared/libosmocore/src/gsm/tlv_parser.c b/src/shared/libosmocore/src/gsm/tlv_parser.c deleted file mode 100644 index d18a6bfd..00000000 --- a/src/shared/libosmocore/src/gsm/tlv_parser.c +++ /dev/null @@ -1,209 +0,0 @@ -#include <stdio.h> -#include <stdint.h> -#include <osmocom/core/utils.h> -#include <osmocom/gsm/tlv.h> - -/*! \addtogroup tlv - * @{ - */ -/*! \file tlv.c */ - -struct tlv_definition tvlv_att_def; -struct tlv_definition vtvlv_gan_att_def; - -/*! \brief Dump pasred TLV structure to stdout */ -int tlv_dump(struct tlv_parsed *dec) -{ - int i; - - for (i = 0; i <= 0xff; i++) { - if (!dec->lv[i].val) - continue; - printf("T=%02x L=%d\n", i, dec->lv[i].len); - } - return 0; -} - -/*! \brief Parse a single TLV encoded IE - * \param[out] o_tag the tag of the IE that was found - * \param[out] o_len length of the IE that was found - * \param[out] o_val pointer to the data of the IE that was found - * \param[in] def structure defining the valid TLV tags / configurations - * \param[in] buf the input data buffer to be parsed - * \param[in] buf_len length of the input data buffer - * \returns number of bytes consumed by the TLV entry / IE parsed - */ -int tlv_parse_one(uint8_t *o_tag, uint16_t *o_len, const uint8_t **o_val, - const struct tlv_definition *def, - const uint8_t *buf, int buf_len) -{ - uint8_t tag; - int len; - - tag = *buf; - *o_tag = tag; - - /* single octet TV IE */ - if (def->def[tag & 0xf0].type == TLV_TYPE_SINGLE_TV) { - *o_tag = tag & 0xf0; - *o_val = buf; - *o_len = 1; - return 1; - } - - /* FIXME: use tables for knwon IEI */ - switch (def->def[tag].type) { - case TLV_TYPE_T: - /* GSM TS 04.07 11.2.4: Type 1 TV or Type 2 T */ - *o_val = buf; - *o_len = 0; - len = 1; - break; - case TLV_TYPE_TV: - *o_val = buf+1; - *o_len = 1; - len = 2; - break; - case TLV_TYPE_FIXED: - *o_val = buf+1; - *o_len = def->def[tag].fixed_len; - len = def->def[tag].fixed_len + 1; - break; - case TLV_TYPE_TLV: -tlv: /* GSM TS 04.07 11.2.4: Type 4 TLV */ - if (buf + 1 > buf + buf_len) - return -1; - *o_val = buf+2; - *o_len = *(buf+1); - len = *o_len + 2; - if (len > buf_len) - return -2; - break; - case TLV_TYPE_vTvLV_GAN: /* 44.318 / 11.1.4 */ - /* FIXME: variable-length TAG! */ - if (*(buf+1) & 0x80) { - /* like TL16Vbut without highest bit of len */ - if (2 > buf_len) - return -1; - *o_val = buf+3; - *o_len = (*(buf+1) & 0x7F) << 8 | *(buf+2); - len = *o_len + 3; - if (len > buf_len) - return -2; - } else { - /* like TLV */ - goto tlv; - } - break; - case TLV_TYPE_TvLV: - if (*(buf+1) & 0x80) { - /* like TLV, but without highest bit of len */ - if (buf + 1 > buf + buf_len) - return -1; - *o_val = buf+2; - *o_len = *(buf+1) & 0x7f; - len = *o_len + 2; - if (len > buf_len) - return -2; - break; - } - /* like TL16V, fallthrough */ - case TLV_TYPE_TL16V: - if (2 > buf_len) - return -1; - *o_val = buf+3; - *o_len = *(buf+1) << 8 | *(buf+2); - len = *o_len + 3; - if (len > buf_len) - return -2; - break; - default: - return -3; - } - - return len; -} - -/*! \brief Parse an entire buffer of TLV encoded Information Eleemnts - * \param[out] dec caller-allocated pointer to \ref tlv_parsed - * \param[in] def structure defining the valid TLV tags / configurations - * \param[in] buf the input data buffer to be parsed - * \param[in] buf_len length of the input data buffer - * \param[in] lv_tag an initial LV tag at the start of the buffer - * \param[in] lv_tag2 a second initial LV tag following the \a lv_tag - * \returns number of bytes consumed by the TLV entry / IE parsed - */ -int tlv_parse(struct tlv_parsed *dec, const struct tlv_definition *def, - const uint8_t *buf, int buf_len, uint8_t lv_tag, - uint8_t lv_tag2) -{ - int ofs = 0, num_parsed = 0; - uint16_t len; - - memset(dec, 0, sizeof(*dec)); - - if (lv_tag) { - if (ofs > buf_len) - return -1; - dec->lv[lv_tag].val = &buf[ofs+1]; - dec->lv[lv_tag].len = buf[ofs]; - len = dec->lv[lv_tag].len + 1; - if (ofs + len > buf_len) - return -2; - num_parsed++; - ofs += len; - } - if (lv_tag2) { - if (ofs > buf_len) - return -1; - dec->lv[lv_tag2].val = &buf[ofs+1]; - dec->lv[lv_tag2].len = buf[ofs]; - len = dec->lv[lv_tag2].len + 1; - if (ofs + len > buf_len) - return -2; - num_parsed++; - ofs += len; - } - - while (ofs < buf_len) { - int rv; - uint8_t tag; - const uint8_t *val; - - rv = tlv_parse_one(&tag, &len, &val, def, - &buf[ofs], buf_len-ofs); - if (rv < 0) - return rv; - dec->lv[tag].val = val; - dec->lv[tag].len = len; - ofs += rv; - num_parsed++; - } - //tlv_dump(dec); - return num_parsed; -} - -/*! \brief take a master (src) tlvdev and fill up all empty slots in 'dst' */ -void tlv_def_patch(struct tlv_definition *dst, const struct tlv_definition *src) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(dst->def); i++) { - if (src->def[i].type == TLV_TYPE_NONE) - continue; - if (dst->def[i].type == TLV_TYPE_NONE) - dst->def[i] = src->def[i]; - } -} - -static __attribute__((constructor)) void on_dso_load_tlv(void) -{ - int i; - for (i = 0; i < ARRAY_SIZE(tvlv_att_def.def); i++) - tvlv_att_def.def[i].type = TLV_TYPE_TvLV; - - for (i = 0; i < ARRAY_SIZE(vtvlv_gan_att_def.def); i++) - vtvlv_gan_att_def.def[i].type = TLV_TYPE_vTvLV_GAN; -} - -/*! @} */ |